okay, some off the top of my head, I'm certain most of these aren't for sale in general.
pretty sure they haven't been posted but...here they are, some of my absolute favorites
(Dark Cloud)- Wonderful soundtrack, and I'm certain this isn't for sale, or if it was it isn't now.
https://www.youtube.com/watch?v=QSZOR0v-y6w (Dark Cloud 2 US/Dark Chronicle in JP)- Sequel to Dark Cloud, the more popular of the two, really fun and bouncy and almost twice as long! You could buy the Japanese CD for like 27 bucks off of Amazon but usually I've found the Japanese versions to have vocals...at least with words, harmonies don't count right? Anyway, can't go wrong.
(Gradius III) Now, I'm sure many are familiar, probably you as well Ross, but this is an incredible engaging soundtrack for a space shmup. The other soundtracks in the rest of the series' including their own parody "parodius" all have awesome soundtracks.
(Megaman Legends) My favorite megaman series. Also, "The Main Gate" is a super short looped song under 30 seconds played for about a minute and a half in that playlist video, but you could put that on loop and listen to it FOREVER and get so much done! Like many, I'm distraught the 3rd game got cancelled even after they made a demo. It had a HUGE level of fan involvement from voting on personalities of NPCs to mechanics, characters, and enemy designs. Talk about it being horrible to kill a game, this was dangled in front of all the fans and taken away. Though there is a fan made spiritual successor and a google or youtube search of "Homebrew Dash 3" will get you there. Seems pretty cool, very pretty and well done imo. Not out yet I think. One of the best "screw Capcom" projects. No English site up yet either but...it's moving along. A bigger rant for another time...so here's the happy music that DOES exist.-download: http://www.legends-station.com/?page=mml1/music
(Megaman Legends 2) Sequel to MML, I haven't played it personally, though I've watched a playthrough, it's kinda hard to get unfortunately but hey, limited cartridges and all. Like the first, lots of ruins and old dungeons combined with city stuff and open nature songs in other areas.-download: http://www.legends-station.com/?page=mml2/music
(Super Mario RPG) My favorite game of all time also has one of my favorites...definitely top 3. Can't say enough about it. Just a fun, wondrous soundtrack that's just.so.good.
Bonus!: a group called "CrazyGroupTrio" did a piano cover of the SMRPG soundtrack and it's also super awesome, just discovered it searching for a link too! https://play.google.com/music/preview/B6cpfxn5g4fzoejgatusknejkae?utm_source=na_Med&utm_medium=hasem&utm_campaign=MusicPLA&pcampaignid=MKT-DR-na-us-all-Med-pla-mu-Evergreen-Jun2315-1-albums&gl=US&gclid=CMGopui2hMoCFcNAfgod8c0Mcg&gclsrc=ds This one is obviously for sale, but I'd buy it.
If I have any more I don't find in the forum I'll get it up here.